Innovative application of glass fiber self-adhesive tape in waterproofing engineering

Introduction

In building waterproofing engineering, the lap joint of the membrane is a high-risk area for leakage, accounting for more than 65% of all leakage points. Traditional processing methods such as hot melt welding and cold adhesive tape have problems such as high energy consumption, complex construction, and poor durability. Fiberglass self-adhesive tape provides a revolutionary solution for waterproofing engineering with its unique self-adhesive properties and deformation resistance.

1、 Analysis of Leakage Mechanism in Waterproof System

Types of joint defects

Opening defect: gaps caused by insufficient overlap width or insufficient bonding

Edge curling defect: a water seepage channel formed by curled edges

Hole defect: a leakage point formed by the penetration of foreign objects during construction

Environmental stress effects

UV aging: causes the surface of asphalt based waterproofing membrane to become brittle, resulting in a 40% decrease in bonding strength at the overlap

Temperature cycle: generates thermal expansion and contraction displacement of 0.2-0.5mm

Chemical erosion: Acid rain (pH<4.5) causes surface corrosion of the coil material

Dynamic load influence

The effects of building settlement and wind vibration cause periodic stress on the waterproof layer, and the fatigue life of traditional materials is only 3-5 years.

2、 Analysis of the advantages of self-adhesive tape technology

Three dimensional stress dispersion mechanism

The elastic modulus of glass fiber mesh (70GPa) is between the coil (0.1-1GPa) and the concrete (30GPa), forming a gradient transition layer. Finite element simulation shows that this structure can reduce the peak stress at the lap joint by 58% and improve the uniformity of stress distribution by 35%.

**Multi environmental adaptability design

High temperature resistance: The acrylic coating has a softening point of 120 ℃ and can withstand sustained high temperatures up to 80 ℃

Low temperature resistance: maintains flexibility in an environment of -40 ℃, with a brittleness temperature of<-50 ℃

Corrosion resistance: After 1000 hours of salt spray test, there is no corrosion on the surface

Construction energy efficiency improvement

Energy consumption reduction: No need for hot melt equipment, single square meter construction energy consumption has been reduced from 1.2kWh to 0.05kWh

Efficiency improvement: The daily construction volume of skilled workers has increased from 50 square meters to 200 square meters

Quality controllable: Adopting standardized operation of "one tear, one stick", the pass rate has been increased from 75% to 98%

3、 Typical Engineering Application Practice

A super high-rise complex project in Shenzhen

The roof of this project adopts TPO waterproofing membrane system, and self-adhesive tape is used to strengthen nodes such as parapets and roof pipes. After 5 years of tracking and monitoring, the leakage rate of the lap joint has decreased from the industry average of 8% to 0.2%, and has been awarded the Luban Award for Quality Engineering Certification.

A certain underwater tunnel project in Qingdao

Galvanized glass fiber self-adhesive tape has been developed for the corrosive environment of seawater. By utilizing the principle of electrochemical protection, the zinc layer is preferentially corroded to protect the substrate from corrosion. The waterproof system of the tunnel has maintained a 100% integrity rate since its operation for 8 years.

A subway station project in Chengdu

In the waterproof construction of the side wall, the "pre laid anti sticking" process is used to directly stick the self-adhesive tape to the concrete base surface. This technology forms full adhesion between the coil and the structural layer, increasing the anti slip ability by 5 times, effectively solving the problem of water leakage in traditional air laying processes.

4、 Technical standards and construction specifications

Material performance requirements

Adhesive strength: ≥ 1.5N/mm with coil and ≥ 1.0N/mm with concrete

Water resistance: After immersion in water for 168 hours, the adhesive strength retention rate is ≥ 90%

Puncture resistance: 500g steel needle, 100mm drop distance puncture without damage

Artificial climate aging: Color difference Δ E<3 after 2000 hours, no cracks

Key points of construction quality control

Base treatment: concrete strength ≥ C20, surface flatness deviation ≤ 3mm/2m

Overlap width: facade ≥ 100mm, plane ≥ 80mm

Rolling process: Use a 50kg roller to roll back and forth three times

Maintenance time: Avoid rainwater erosion within 48 hours after pasting

5、 Innovative development direction

Self healing function integration

Developing microcapsule self-adhesive tape, when the crack width reaches 0.2mm, the capsule ruptures and releases repair agent, achieving automatic healing. Laboratory tests have shown that the material has a repair rate of 85% for cracks below 0.5mm.

Integrated application of photovoltaics

Develop transparent glass fiber self-adhesive tape with a light transmittance of 92%, which can be applied to BIPV (Building Integrated Photovoltaics) systems. While maintaining waterproof function, it does not affect the power generation efficiency of photovoltaic modules.

Digital construction management

Develop an intelligent construction guidance system using AR technology. By using a head mounted display, real-time display of parameters such as overlap position and rolling pressure can be achieved, increasing the construction qualification rate to 99.5%.

Conclusion

Fiberglass self-adhesive tape has reconstructed the technical system of waterproofing engineering through material innovation and process innovation. With the advancement of the "dual carbon" target, this material will play a greater role in sponge city construction, underground comprehensive pipe gallery and other fields, promoting the transformation and upgrading of the waterproofing industry towards green and intelligent direction.